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Finding the Fourth Proportional to 102,477.80, 153,572.70 and 81,453.80

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Solution

The fourth proportional to 102,477.80, 153,572.70 and 81,453.80 is: 122,066.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,477.80 : 153,572.70 = 81,453.80 : x
  2. Step 2: Convert to fraction form
    102,477.80/153,572.70 = 81,453.80/x
  3. Step 3: Cross multiply
    102,477.80x = 153,572.70 × 81,453.80
  4. Step 4: Simplify right side
    102,477.80x = 12,509,079,991.26
  5. Step 5: Solve for x
    x = 12,509,079,991.26/102,477.80
  6. Step 6: Final answer
    x = 122,066.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.